Connected: An Internet Encyclopedia
RFC 1421 - 4.6.4 Per-Recipient Encapsulated Header Fields

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### 4.6.4 Per-Recipient Encapsulated Header Fields

The encapsulated header fields in this group appear for each of an "ENCRYPTED" message's named recipients. For "MIC-ONLY" and "MIC- CLEAR" messages, these fields are omitted for recipients for whom asymmetric key management is employed in conjunction with a keyless MIC algorithm but the fields appear for recipients for whom symmetric key management or a keyed MIC algorithm is employed.

4.6.4.1 Recipient-ID Fields

4.6.4.1.1 Recipient-ID-Asymmetric Field
4.6.4.1.2 Recipient-ID-Symmetric Field

4.6.4.2 Key-Info Field

4.6.4.2.1 Symmetric Key Management
4.6.4.2.2 Asymmetric Key Management

Next: 4.6.4.1 Recipient-ID Fields

Connected: An Internet Encyclopedia
RFC 1421 - 4.6.4 Per-Recipient Encapsulated Header Fields